On the nature of quasi periodic oscillations in the black hole candidate GRS 1915+105.

Details On the nature of quasi periodic oscillations in the black hole candidate GRS 1915+105. On the nature of quasi periodic oscillations in the black hole candidate GRS 1915+105.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999injpb..73..967m&link_type=abstract

Indian J. Phys., Part B, Vol. 73B, No. 6, p. 967 - 976

Physics

X-Ray Transients: Quasi-Periodic Oscillations

Scientific paper

The authors analyze RXTE data of the transient black hole candidate GRS 1915+10 and find that the quasi periodic oscillations (QPO) are of variable frequency. Power density spectra reveal that there is more power in high energy X-rays, indicating that the QPO might be originated due to shock oscillations. A few timescales have been identified and generally it is found that the longest time-scale (≡100 s) is related to the time it takes to fill the volume upto the sonic sphere, and the shorter time scale (≡0.1 s) is related to the free-fall time in the post-shock region.

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